Pat the shrimp dry with paper towels to remove excess moisture.
In a large bowl, whisk together the flour, cornstarch, baking powder, garlic powder, salt, and pepper. Gradually add the cold beer, stirring until smooth and thick.
Dip each shrimp into the beer batter, ensuring it is well coated. Let any excess batter drip off.
Preheat the air fryer to 375°F (190°C) for about 3-5 minutes.
Place the battered shrimp in the air fryer basket in a single layer, making sure they are not overcrowded. Lightly spray them with cooking spray. Air fry at 375°F for 6-8 minutes, flipping halfway through, until golden and crispy.
Remove from the air fryer and serve immediately with your favorite dipping sauce. Enjoy!